Pokémon Black Version Easter eggs

Visiting Game Freak
In Castelia City, there is a building in which you can find various NPCs representing actual Game Freak members. One of these characters can be challenged to a battle after defeating the Elite Four. This building also houses various goodies and commendations for doing things like completing the Pokedex. To get there, all you need to do is get to the Castelia Pokemon Center. In the roadway leading north (up) just to the east (right) of the center, there is a single building on the right that you can enter. Go inside, and go to the elevator. Go to the 22nd floor, and you will encounter Game Freak!